Installation manual

4.9.4. The connections made to the penstock

You will need up to 2 penstock connections for every PLT turbine, and up to 4 for every TRG

turbine.

Connection to the penstock can be made in the following ways:

 Bolt over saddles and flexible hoses

 Pipe fittings - T’s and Y’s

 Our PVC 4 jet manifold – for PVC pipes and the TRG turbine

 Our PVC 2 jet manifold – for PVC pipes and the PLT turbine

4.9.5. Bolt over saddles

These are available to order with your turbine for pipes

with outside diameters of:

 160 mm

 110 mm

 90 mm

You can install as many as are needed. They are

double sided so provide 2 x 50mm BSP male threads

per saddle set. Pictures below show how you install them on your pipes.

These saddles can also be used for making a large pipe vent just after the intake.

Once the saddles are fitted, use the valves and camlocks (often supplied with your TRG

turbine) as shown. Note that the valves are fitted to the saddle and not to the turbines. This

ensures that the turbines can be easily removed for servicing leaving the off valves in place.

Saddles have the following advantages:

 Low cost

 Less freight bulk and light in weight

 Easy to fit, no special tools needed

Saddles have the following disadvantage:

 Sharp take-off so higher fitting losses,

meaning they are not suited to low

head, high flows

Saddles connected to turbines via camlocks and flexible pipes suit heads between 10m and

60m, and flows up to 3 l/s per turbine jet with 50mm ID pipework. Most PLT turbines can be

connected in this manner. For TRG applications the next option should also be considered.